Voters in southern Sudan have begun the registration process for next year's referendum in which the south will seek independence. <br /><br />In addition to the broader referendum, a small region called Abyei, which sits astride the oil-rich border between the south and north, will vote to decide which part it wants to join.<br /><br />There are already fears that the sharing of oil wealth may create trouble between the north and the south.<br /><br />The Unity State, which is also rich in oil reserves, borders northern Sudan, and is a potential flashpoint.<br /><br />Haru Mutasa gained exclusive access to troops from the Sudan People's Liberation Army in Unity State and reports.
